Ultimate Survival Technologies Reusable Heat Pack (20-12122)

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UST Reusable Heat PackHot and ReadyWhether you need to keep your hands warm out in the wilderness or just need to relieve a sore back after a long day, the UST Reusable Heat Pack h as you covered. This chemically-powered heat pack contains a special sodium acetate and water solution that will heat up to 130°F (54°C) within 15 seconds of activating. The handy heater is activated by bending the enclosed metal disk until it clicks, which causes the solution to crystallize and provide up to 2 hours of heat. The heat pack is environmentally friendly, as it can be reused numerous times by placing it in boiling water (see instructions on package) to rejuvenate it.Features: Sodium Acetate (CH3NaO2) and water solution begins warming after bending metal activation disk inside pouch Heats up to 130°F (54°C) in just 15 seconds Provides heat for up to 2 hours when properly insulated Can be rejuvenated by placing in boiling water Environmentally friendly, capable of being reused numerous times Product Dimensions: HxWxD: 4.13″ x 2.95" x 0.79" (105 x 75 x 20mm) Show more